"In 2014 a study published in Nature Communications found that VOC emissions (a variety of carbon gases that can produce smog and harm human beings) were on average 124 times higher from an idling two-stroke scooter than from a truck or a car"
Though this quote does make me wonder, what about when each vehicle are in transit?
A far better solution is to replace these sorts of things with battery powered electric solutions.
Miniaturizing it to work on a hand-held lawn care device is just an engineering task.
Two simple things fixed that:
1. I switched to gasoline that does not have ethanol added.
2. Once every 2 to 4 weeks in the off season I start it and run the engine for a minute.
The container I use to store gas holds about two years worth and the mower runs fine on the the two year old gas. I do add fuel stabilizer. The bottle of that claims it is good for 2 years but my previous bottle was 6 years old when I replaced it and the mower was fine on 2 year old fuel with 6 year old stabilizer.
If you live near any body of water big enough to attract boats you might try at marinas. CENEX also often sells it. Here's a site that can help you find it locally if you are in the US or Canada [1].
I do not do any winterizing procedure for the off season. I asked the repair place I took it too one year when it would not start before I started doing #1 and #2 if winterizing was necessary if you were running it occasionally, and they verified that you only need winterizing if it is going to not be used.
For overwintering, I just detach the hose after the fuel filter and drain the remaining mower fuel back into the can. Or, on small push mowers where this isn't possible, use the fuel shutoff and just leave the gas in the tank.
Then run the mower until it dies. Doesn't take more than a minute.
Finally, unscrew sparkplug(s), pour a teaspoon of motor oil into the cylinder (keeps rings from seizing/rusting).
Leftover gas in the can gets put into vehicles at the end of the season so I'm not storing stale gas.
Cost.
I would have gone electric if I could but seeing as I don't obsess over my lawn (i.e. I let it grow out enough before cutting it back that most HNers would be hand wringing if I were their neighbor) there's no amount of mental gymnastics that makes it a sane tradeoff. I'm not gonna double the cost on something I run maybe 20min/mo. If I were one of those people who bought overpriced premium equipment I didn't need then it might make sense.
I could do without the noise but I own fancy Bluetooth hearing protection for other reasons so that's really a non-issue. A little bit of exhaust every 3-5 weeks in the summer is just a non-issue in practice. I'm sure if I had some ideological reason to care a lot I'd find it more annoying but I don't so...
I have a friend who has the whole 40v kit. In retrospect I definitely made the right decision because his stuff doesn't have the requisite power/duty cycle for my "it's been a month and I have company this weekend, time to mow the lawn" use case and the noise of the gas stuff is less of an issue when it's a monthly thing and not a weekly thing.
Here in the UK, an entry-level petrol mower is £150+ while an entry-level corded electric mower is only £50. They're also much lighter, which is great for ladies and kids. And they start really reliably, even if they've sat in a shed all winter.
I wonder if it’s due to our outlets being 120V? We’d be limited to less than 2.5 HP with a normal outlet, whereas gas push mowers typically have engines in the 5-7 HP range.
I live in a metro, but my property is about an acre. I bought an electric lawnmower/weed eater when I bought the house. I used them for a year, then donated them and bought gas (4 stroke for both).
The problems I encountered: Batteries are expensive and they just don't last nearly long enough (both charge and life). To do a real pass on my yard without waiting for a charge cycle, I would have needed about 4 batteries for the trimmer, and 8 for the mower. I do live in a heavily wooded area with a large number of vines (and kudzu...) but still - that's nearly 1000 dollars in batteries alone. I opted to wait, and stick with 4, but it means what was previously 4 hours in the yard is now 4 hours split into several sections - an all day affair.
Even with the above, I would have probably stuck with the trimmer (the mower was just garbage), except I had two batteries fail in the first year. That's just an unacceptable extra cost for yard work, and FAR eclipses the entire amount I've spent on gas for the mower/trimmer combined over the last 3 years I've had them.
So... No. Frankly I don't think they're there yet. It's very close, but it's slower, and frankly - outrageously more expensive.
So I'm going to wait for cost to come down, and regulation to address battery interoperability in this equipment (hah... as if our government would actually do something useful).
My reasoning is that oil still gets burned, likely at a higher rate than any oil that gets through on the four stroke. It would be interesting to see if two strokes could be redesigned to place the oil outside of the combustion chamber, I think that would be a serious game changer for ICEs.
That being said, I'm definitely an advocate for moving away from combustion altogether.